Troy-Bilt 21A-630B063 Owner's manual

Category
Mini tillers
Type
Owner's manual

This manual is also suitable for

0 TRnV BILT'"
Operator's Manual
Rear-tine Tiller Models
630B--Tufty _
634F--Bronco TM
634B--Super BroncoTM
Mode1634B Shown
IMPORTANT:READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-cov-
ered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any). If a
spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law
(Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester
for the muffler is available by contacting the service department at Troy-Bilt LLC, P.O. Box 361131 Cleveland, Ohio 44136-0019.
TROY-BILT LLC, P.O. BOX 361131, CLEVELAND, OH 44136-0019
PRINTED IN USA FROM NO. 770-10594A
(12/2001 )
TABLE OF CONTENTS
Content Page
Calling Customer Support .................................................... 2
Safety ................................................................... 3
Assembly ................................................................. 6
Features and Controls ....................................................... 10
Operation ................................................................ 12
Maintenance .............................................................. 17
Off-Season Storage ........................................................ 21
Troubleshooting ........................................................... 22
Parts List ................................................................. 23
Warrany Information ........................................................ Back Cover
FINDINGMODELNUMBER
This Operator's Manual is an important part of your new Rear-tineTitter. It will help you assemble, prepare and main-
tain the unit for best performance. Please read and understand what it says.
Before you start assembling your new equipment, please locate the model plate on the equipment and copy the infor-
mation from it in the space provided below. This information is very important if you need help from our Customer
Support Department or an authorized dealer.
You can locate the model number by looking at the rear surface of the tine shield. A sample model plate is
explained below. For future reference, please copy the model number and the serial number of the equipment
in the space below
O BILT" TROY-BILT LL(
P. O. BOX 361131
www.troybilt.com CLEVE_ND,OH_136
330-558-7220
866-840-648_
Copy Model Number Here
Copy Serial Number Here
ENGINEINFORMATION
The engine manufacturer is responsible for all engine-related issues with regards to performance, power-rating, speci-
fications, warranty and service. Please refer to the engine manufacturer's Owner's/Operator's Manual packed sepa-
rately with your unit for more information.
CALLINGCUSTOMERSUPPORT
If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance
of this unit, please call the Customer Support Department.
Call 1- (330) 558-7220 or 1- (866) 840-6483 to reach a Customer Support representative. Please have
your unit's model number and serial number ready when you call. See previous section to locate this
information. You will be asked to enter the serial number in order to process your call ..
Safety
This machine meets voluntary safety standard
B71.8 - 1996, which is sponsored by the Outdoor
Power Equipment Institute, Inc., and is published
by the American National Standards Institute.
ForwardClutchBail
ReverseClutch
Control(Models
634F/634a)
WARNING
The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects or other reproductive harm.
DepthRegulator
TineHood Flap
f
SafetyAlert Symbol
This is a safety alertsymbol. It is used in this
manualand on the unit to alertyou to poten-
tial hazards. Whenyou seethis symbol, read
and obeythe messagethat follows it. Failure
to obeysafety messagescould result in
personal injury or property damage.
Standard-Rotating-
Tines(SRT)
WheelDrivePin
(on eachwheel)
Figure1-1: Tillerfeaturesandcontrols(5.SHPModelshown),Seeseparate
EngineOwner'sManualtoidentifyenginecontrols.
Training
1. Carefullyreadthis Owner's
Manual,the separateEngine
Owner's Manual,and any
other literature you may receive.Bethor-
oughlyfamiliar with the controls andthe
proper use ofthe tiller and its engine.
Knowhow to stop the unit and disengage
the controls quickly.
2. Neverallow children to operatethe
tiller. Neverallow adultsto operatethe
tiller without proper instruction.
3. Keepthe areaof operationclear ofall
persons,particularly children and pets.
4. Keepin mind that the operatoror user
is responsiblefor accidents or hazards
occurring to other people,their property,
and themselves.
Preparation
1. Thoroughly inspectthe areawhere the
tiller is to be usedand remove all foreign
objects.
2. Be sureall tiller controls are released
and both wheels are in the Wheel Drive
position beforestarting the engine.
3. Do not operatethe tiller without
wearing adequateouter garments. Avoid
loosegarments or jewelry that could get
caught in moving parts.
4. Do not operatethe tiller when barefoot
or wearingsandals, sneakers,or light
footwear. Wear protective footwear that
will improve footing on slippery surfaces.
5. Do not till near underground electric
cables,telephonelines, pipesor hoses. If
in doubt, contact your telephoneor utility
company.
6. Warning: Handlefuel with care; it is
highlyflammable and its vaporsare explo-
sive. Takethe following precautions:
a. Storefuel in containers specifically
designedfor this purpose.
b. Thegascapshall neverbe removed
or fuel addedwhilethe engineis run-
ning. Allowthe engineto coolfor
severalminutesbeforeaddingfuel.
¢. Keepmatches,cigarettes, cigars,
pipes, openflames, and sparks
away from thefuel tank and fuel
container.
d. Fillfuel tank outdoorswith extreme
care. Neverfill fuel tank indoors.
Useafunnel or spout to prevent
spillage.
e.
f.
Replaceall fuel tank and container
caps securely.
If fuel is spilled, do notattempt to
start the engine, but movethe
machine awayfrom thearea of
spillageand avoid creating any
source of ignition until fuel vapors
havedissipated.
7. Never makeadjustmentswhen engine
is running (unless recommendedby
manufacturer).
Operation
1. Donot put handsor feet nearor under
rotating parts.
2. Exerciseextremecaution when on or
crossing graveldrives, walks, or roads.
Stay alertfor hidden hazardsor traffic. Do
notcarry passengers.
3. After striking a foreign object,stop the
engine, removethe wire from the spark
plug wire and prevent it from touching the
spark plug.Thoroughly inspect the
machinefor anydamageand repair the
damagebeforerestarting and operating
the machine.
4. Exercisecaution to avoid slipping or
falling.
5. If the unit should start to vibrateabnor-
mally, stop the engine,disconnect the
spark plug wire and prevent it from
touching the spark plug,and checkimme-
diatelyfor the cause. Vibration isgener-
ally a warning oftrouble.
6. Stopthe engine,disconnect the spark
plug wire and prevent it from touching the
spark plug, wheneveryou leavethe oper-
ating position, before uncloggingthe tines,
or when making any repairs, adjustments
or inspections.
7. Takeall possible precautionswhen
leavingthe machine unattended. Stopthe
engine. Disconnectthe spark plug wire
and move it awayfrom the spark plug. Be
surethat both wheelsare in the Wheel
Drive position.
8. Beforecleaning,repairing, or
inspecting, stop the engineand make cer-
tain all moving parts havestopped. Dis-
connectthe spark plug wire andprevent it
from touching thespark plug to prevent
accidentalstarting.
9. Theflap on the tine hood must bedown
when operating thetiller.
lB. Neverusethe tiller unless proper
guards, plates,or other safetyprotective
devicesare in place.
11. Donot run the engine in an enclosed
area. Engineexhaustcontains carbon
monoxide gas,a deadlypoison that is
odorless,colorless, and tasteless.
12. Keepchildren and petsaway.
13. Neveroperatethetiller underengine
powerif thewheels are in the Freewheel
position.Inthe Freewheelposition, the
wheels will not hold thetiller backand the
revolving tines could propel the tiller
rapidly, possibly causing loss of control.
Always engagethewheels with the wheel
drive pins in the WheelDrive position
beforestarting the engine or engaging the
tines/wheels with the Forward ClutchBail
(all models) or the ReverseClutchcontrol
(Models 634F/634B only).
14. Beawarethatthetiller may unex-
pectedlybounceupwardor jumpforward
ifthe tinesshouldstrike extremelyhard
packedsoil, frozenground,or buried
obstacleslike largestones,roots,or
stumps.If in doubtaboutthe tilling con-
ditions,alwaysusethefollowing
operatingprecautionsto assistyouin
maintainingcontrolofthetiller:
a. Walk behindandto oneside ofthe
tiller, usingonehandon thehan-
dlebars. Relaxyourarm, butusea
securehandgrip.
b. Useshallowerdepthregulatorset-
tings, workinggraduallydeeper
with eachpass.
c. Useslowerenginespeeds.
d. Clearthe tilling area ofall large
stones,rootsand otherdebris.
e. Avoidusingdownwardpressureon
the handlebars.If need be, use
slight upwardpressureto keepthe
tines fromdiggingtoo deeply.
f. Beforecontactinghardpackedsoil
at the end ofa row, reduceengine
speedand lift the handlebarsto
raise thetines outofthe soil.
g. In an emergency,stopthe tines and
wheels byreleasingwhichever
clutchcontrolis engaged.Do not
attempttorestrainthetiller.
15. Donot overloadthe tiller's capacity by
attempting to till too deeplyattoo fast a
rate.
16. Neveroperatethetiller at high trans-
port speeds on hard or slippery surfaces.
Look behind and usecarewhen backing
up.
17. Donot operatethe tiller on a slope
that is too steepfor safety.When on
slopes,slow down and make sureyou
havegood footing. Neverpermit the tiller
to freewheeldown slopes.
18. Neverallow bystanders nearthe unit.
19. Onlyuseattachments and accessories
that are approvedby the manufacturer of
the tiller.
20. Usetiller attachments and accessories
when recommended.
21. Neveroperatethetiller without good
visibility or light.
22. Neveroperatethetiller if you are tired;
or underthe influence ofalcohol, drugs or
medication.
23. Operatorsshall not tamper with the
engine-governorsettings on the machine;
the governor controls the maximum safe
operatingspeedto protect theengine and
all moving parts from damagecaused by
overspeed. Authorized service shall be
sought if a problem exists.
24. Donot touch engineparts which may
be hot from operation. Let parts cool down
sufficiently.
25. Pleaseremember:You canalways
stop the tines and wheels by releasingthe
ForwardClutch Bail or on Models 634F
and 634Bthe ReverseClutchcontrol,
(whichever control is engaged),or by
moving the ignition switch and/or throttle
control leveron the engineto "OFF"or
"STOP".
26. To load or unloadthe tiller, seethe
instructions in Section 4 of this Manual.
27. Useextremecaution when reversing
or pulling the machinetowards you.
28. Start the enginecarefully according to
instructions and with feet well awayfrom
thetines.
29. Never pick up or carry a machine
while theengine is running.
MaintenanceandStorage
1. Keepthe tiller, attachments and acces-
sories in safeworking condition.
2. Checkall nuts, bolts, and screws at
frequent intervalsfor proper tightness to
be surethe equipment is in safe working
condition.
3. Neverstore the tiller with fuel in the fuel
tank inside a building where ignition
sourcesare present such as hot water and
spaceheaters,furnaces, clothesdryers,
stoves,electric motors, etc.). Allow the
engineto cool beforestoring the unit in
anyenclosure.
4. To reducethe chancesof a fire hazard,
keepthe engine free of grass, leaves,or
excessivegrease.
5. Storegasoline in a cool, well-ventilated
area,safelyaway from any spark- or
flame-producing equipment. Storegaso-
line in an approvedcontainer, safelyaway
from the reachof children.
6. Referto the Maintenancesections of
this Manualand the separateEngine
Owner's Manualfor instructions if the unit
is to bestored for an extended period.
7. Neverperform maintenancewhile the
engine is running orthe spark plug wire is
connected,exceptwhen specifically
instructed to do so.
8. If thefuel tank hasto be drained,do
this outdoors.
Decals
Foryour safety and the safety of
others, various safety and opera-
tional decalsare located on your
unit (seeFigure1-2).
Keepthe decals cleanand legible at
all times. Contactyour local ser-
vice dealeror the factory for
replacements ifany decalsare
damagedor missing.
Referto the Parts List pagesin this
Manualfor decallocations, descrip-
tions and part numbers.
ForwardClutchBail
OperatingInstruction
Starting Stabilization
Message (onengine)
\
ReverseClutchControl
OperatingInstruction
(Models 634F/634B)
Messages
Rot SurfacesWarning
(onbelt cover)
Figure1-2: Locationofsafety andoperatingdecals(5.5HP Model shown).
OperatingSymbols
Varioussymbols (shown here,with word
descriptions)may beusedon the tillerand
engine. Your unit may not haveall of the
symbols.
FAST SLOW STOP
H I÷1 R
CHOKE CHOKE REVERSE '_'
ROTATING
ON OFF TINES
41E-->
TILLERDIRECTION LEVERDIRECTION
BAIL BAIL
ENGAGED DISENGAGED
TO AVOID SERIOUS INJURY:
READTHEOWNER'SMANUAL.
KNOWLOCATIONSANDFUNCTIONSOFALLCONTROLS.
KEEPALL SAFETYDEVICESANDSHIELDSIN PLACEANDWORKING.
NEVERALLOWCHILDRENORUNINSTRUCTEDADULTSTO OPERATETILLER.
SHUTOFFENGINEANDDISCONNECTSPARKPLUGWIREBEFOREMANUALLYUNCLOG-
GINGTINES ORMAKINGREPAIRS.
KEEPBYSTANDERSAWAYFROM MACHINE.
KEEPAWAY FROMROTATINGPARTS.
USEEXTREMECAUTIONWHENREVERSINGORPULLINGTHEMACHINETOWARDSYOU.
Assembly
To prevent personal injury or property
damage, do not start the engine until
all assembly steps are complete and
you have read and understand the
safetyand operatinginstructionsin this
manual.
INTRODUCTION
Carefullyfollow these assembly stepsto
correctly prepareyour tiller for use. It is
recommendedthat you readthis Section
in its entirety before beginning assembly.
NOTE:Varioustiller models are presented
in this Manual.Useonlythe information
appropriate for your tiller model.
INSPECTUNIT
Inspect the unit and carton for damage
immediately after delivery. Contactthe
carrier (trucking company) if you find or
suspectdamage. Inform them of the
damageand request instructions for filing
a claim. To protect your rights, put your
claim in writing and maila copy to the car-
rier within 15days after the unit hasbeen
delivered.Contactthe factory if you need
assistance in this matter.
TOOLS/MATERIALSNEEDED
FORASSEMBLY
(1) 3/8" open-endwrench*
(2) 7/16"open-end wrench*
(2) 1/2"open-end wrench*
(2) 9/16"open-end wrench*
(1) Largeadjustablewrench (Models
634F/634Bonly)
(1) Scissors(to trim plastic ties)
(1) Ruler(for belt tension check)
(1) Blockof wood (to support tiller
when removing wheels)
(1) Tire pressure gauge (for models with
pneumatictires)
(1) Cleanoilfunnel
(1) Motoroil. Referto the EngineOwner's
Manualfor oil specificationsand
quantityrequired.
* Adjustablewrenches may be used.
ASSEMBLYSTEPS
STEP1: UNPACKINGINSTRUCTIONS
NOTE: While unpacking,do not severely
bend any control cables.
1. Thetiller weighs approximately 133 Ibs.
Do not attempt to remove it from the ship-
ping platform until instructed to do so in
theseAssembly steps.
2. Removeany packagingmaterialfrom
the carton. Removeanystaplesfrom the
bottom of the carton and removethe
carton from the shipping platform.
3. Removeall unassembledparts andthe
separatehardwarebag from the carton.
Checkthat you havethe items listed in the
LooseParts List (contact your localdealer
or the factory itemsare missing or dam-
aged). NOTE: Usethe screw lengthtem-
plate (Fig. 2-1)to identify screws.
LoosePartsList
Qty. Description
1 HandlebarSupport (seeA, Fig.2-2)
1 HandlebarAssembly(seeK,Fig.2-2)
Hardwarebag contents:
1 Slottedhd. screw, #10-24 x 2"
1 Hexhd. screw, 1/4-20 x 1-1/4"
6 Hexhd. screw, 5/16-18 x 1-1/2"
2 Hexhd. screw, 3/8-16 x 3/4"
2 Flatwasher,3/8"
6 Split Iockwasher,5/16"
1 HexIocknut, 1/4"-20
6 Hexnut, 5/16"-18
1 Hexnut,#10-24
2 HexIocknut, 3/8"-16
1 Spring, cable(seeW, Fig. 2-5)
1 Bracket,forward clutch cable (see
P,Fig.2-4)
2 LockWasher,3/8
2 *Self-tapping screw,1/4-20 x 1/2"
1 *Bracket, reverseclutch cable
*Model 634F& 634B only
IMPORTANT:Motor oil must beaddedto
the enginecrankcase beforethe engineis
started. Follow the instructions in this
Assembly Section and in the separate
Engine Owner's Manual.
NOTE:LEFTand RIGHTsides of the tiller
areas viewed from the operator's position
behind the handlebars.
Figure2-1: Toidentitylengthofscrews,
placescrewontemplateasshownandmea-
suredistancebetweenbottomofscrewhead
andtipofscrew.
STEP 2: ATTACHHANDLEBAR
1. Looselyattach the legsof the handlebar
support (A, Fig. 2-2) to the inner sides of
the tiller frame usingtwo 3/8"-16 x3/4"
hexhd. screws (B), 3/8"flat washers (C),
3/8" lockwashers (GG)and 3/8"-16 hex
Iocknuts (D).
2. Thereare three heightadjustment holes
in the two handlebarsupport brackets (E
and F,Fig. 2-2). Usea setting that will
position the handlebarsat approximately
waist levelwhenthe tines are 3"-4"intothe
soil. Loosely attachthe support brackets
to the handlebarsupport (A)using two
5/16"-18 x 1-1/2" screws (G),5/16"split
Iockwashers(H) and 5/16"-18 hexnuts (I).
NOTE: If a support bracketwill not move,
loosenattaching screw (J) and nut.
3. Attach the handlebarassembly (K) to
the handlebarsupport (A) using four
5/16"-18 x 1-1/2" screws (G),5/16"split
Iockwashers(H) and 5/16"-18 hexnuts (I).
Tighten the four screws securely.
4. Tighten all handlebar mounting hard-
ware securely.
STEP3: MOVE TILLER OFF
SHIPPING PLATFORM
To roll the tiller off the shipping platform,
put the wheels in FREEWHEEL,asfollows:
1. Placea sturdy block underthe trans-
mission to raiseone wheelabout 1" off the
ground.
K
MI
Fig.2-3: Wheelin FREEWHEELposition
(wheeldrivepinthroughwheelshaftonly).
C
D
Fig.2-2:Attachhandlebar(5.5HPModelshown).
2. Removethe hairpin cotter (L, Fig. 2-3)
and wheel drive pin (M) from the wheel
hub (0) andwheelshaft (N).
3. Slide the wheelfully inward onthe
wheel shaft (N, Fig. 2-3). Reinstallthe
wheel drive pin (M) through the wheel
shaft only (not through the wheel hub).
Securethe wheeldrive pin with the hairpin
cotter (L), pushingthe hairpin cotter in as
far as it will go. Thewheelshould now
spin freely (freewheel) on thewheel shaft.
Repeatwith the other wheel.
4. Usethe handlebarto roll the tiller to a
flat area.
IMPORTANT:Beforestarting theengine,
the wheels must be placedin the WHEEL
DRIVEposition (pins through wheel hubs
and wheelshaft). This procedureis
described in WheelDrive Pinsin Section3.
' STEP4: INSTALLFORWARD
CLUTCHCABLE
1. Attach the forward clutch cable bracket
G (P, Fig.2-4) to the handlebarsupport (A)
J
_-_17" with a1/4"-20 x 1-1/4" hex hd. screw(R)
and 1/4"-20 hex Iocknut(S). Tighten
securely.
H I 2. Carefullyunwrapthe forward clutch
cable(cablewithout an attachedknob)
from its shipping position andslide the
thin cablewire (T, Fig.2-4) into the slot in
the cablebracket. Pushthe cablecon-
nector (U, Fig. 2-4) up through the hole in
the bracketuntil the groove in the con-
nector snaps into place.
Fig.2-4:Installingforwardclutchcablebracketandcable,
3. Insertthe #10-24 x 2" slotted hd.screw
(V, Fig.2-5) downthrough the hooked
end of the cablespring (W) until the screw
threads extendthrough the spring.
4.Threadthe#10-24 hexnut (Z, Fig. 2-5)
halfwayonto the screw (V).
5. Threadthe screw (V) into thecable
adjuster (X).
6. Hookthe cablespring (W, Fig.2-6) into
the V-shapedbend in the ForwardClutch
Bail (Y).
7. Checkfor correct tension on the for-
ward drive belt bytaking two measure-
ments ofthe cablespring, as follows:
a. With the Forward ClutchBail (Y, Fig.2-
6) in an open (released)position, mea-
surethe length ofthe cablespring (W)
from the outermost coil to the outer-
most coil.
b. Squeezethe ForwardClutch Bail against
the handlebar(seeFig.2-7) and re-
measurethe spring length. Thebelt
tension is correct ifthis secondmea-
surement is between1/16"to 3/16"
longer thanthe first measurement. If
so, turn the hexnut (Z, Fig.2-7) tightly
against the cableadjuster (X)while pre-
venting the cableadjuster from turning.
c. If the spring lengthis incorrect, you
must adjust the cabletension as
described in Checkingand Adjusting
Forward Drive Belt Tensionin Section5.
Incorrect cabletension can result in belt
slippage (cabletension too loose), or
unintentional tine movementwhen the
clutch bail is in Neutral (cabletension
too tight).
Wm
v
Fig.25: Cable
springand
adjuster,
Fig,2-6:Attachforward
clutchcablespringto
forwardclutchbail.
Fig.2-7: Tocheckforwardbelttension,taketwomeasurementsofthelengthofthecoilsin
thespring- firstwiththebailopen,thenwiththebailheldagainstthehandlebar,
STEP5: INSTALLREVERSECLUTCH
CABLE(MODELS634FAND634B
ONLY)
1. Unwrap the reverseclutch cable(CC,
Fig.2-8 and Fig.2-9) from its shipping
position and route it up to the handlebar.
Besurethat the cableis routed beneath
the Forward Clutch Bail.
2. Using the two self-tapping screws (AA,
Fig.2-8) securethe reversecable
mounting bracket(BB)to the handlebars,
as shown.
3. Insertthe cable(CC,Fig.2-8) through
the slot in the cablebracketand position
the flat side ofthe threadedassemblynext
to the flat side of the hole. Slide the hex
nut (DD) upthe cableand tighten it
securely.
4. Fastenthe reverseclutch cable to the
left side handlebarwith a cabletie (EE,
Fig.2-9).
5. Testthe function of the reverseclutch
bypulling outand releasingthe cable
knob. The knobshould returnto its neu-
tral position (resting against bracket). If it
doesn't, contact your local dealeror the
factory for technical assistance.
FlatSide
Fig.2-8:Installreversecablebracketand
reverseclutchcable,
Fig. 2-9: Routereverseclutchcable (CC)as
shown. Attachwith cabletie (EE).
STEP6:CHECKLEVELOF
TRANSMISSIONGEAROIL
Thetransmission was filled with gear oil at
the factory. However,youshould check
the gear oil levelatthis time to makecer-
tain it is correct.
IMPORTANT:Do notoperatethe tiller if
the gear oil levelis low. Doingso will
result in severedamageto the transmis-
sion components.
1. With the tiller on level ground, pull the
Depth Regulator Lever(FF,Fig. 2-10) back
and then all the way up until the lowest
notch in the leveris engaged.
2. Removethe oil fill plug (GG,Fig.2-11)
from the transmission housing cover and
locate the main drive shaft situated inside
the housing.
3. Thegear oil level is correct if the gear
oil is approximately halfwayup the side of
the main drive shaft.
4. If the oil levelis low, add gearoil by
referring to A. ToCheckthe Transmission
GearOil Level in Section5.
Fig. 2-10: AdjustDepthRegulatorLever.
Fig.2-11:Removegearoilfillplug.
STEP7: ADDMOTOROIL
TO ENGINE
Thetiller is shipped withoutoil in the
engine.
IMPORTANT: Donot startthe engine
without first adding motor oEI.Severe
enginedamagewill result if the enginezs
run without oil.
1. Referto the separateEngineOwner's
Manualfor engine oil specifications and
capacities.
2. With the tiller on levelground, move the
Depth Regulator Lever/FF. Fig. 2-10) up
or down until the engine is level.
3. Add motor oil as described in the
EngineOwner's Manual.
4. Movethe Depth Regulator Leverall the
way down until the hEghestnotch is
engaged. This placesthe tines in the
"travel" position which allows thetiller to
be moved without thetines touching the
ground.
STEP8: CHECKHARDWARE
FORTIGHTNESS
Checkall nuts and screws for tightness.
STEP 9: CHECKAIR PRESSURE IN
TIRES (units with pneumatic tires)
Ontires equEppedwith airvalves, check
the a_rpressure with a tire gauge. Deflate
or inflate thetires equally to 15 to 20 PSI
(pounds per square inch). Besure that
9othtires are inflated equallyor the unit
will pull to one side.
IMPORTANT:This completes the assembly
steps. Beforeoperating your tiller, make sure
you readthe following sections in this Manual.as
well asthe separate EngineOwner's Manual:
Section1: Safety
Section3: Featuresand Controls
Section4: Operation
T FeaturesandControls
Before operating your machine, care-
fully read and understand all safety,
controls and operating instructions in
this Manual, the separate Engine
Owner's Manual, and on the decals on
themachine.
Failure to follow theseinstructionscan
resultin seriouspersonalinjury.
INTRODUCTION
This Sectiondescribes the location and
function of the controls on your tiller.
Referto the following Section, Operation
for detailed operatinginstructions.
Practiceusing thesecontrols, with the
engineshut off, until you understandthe
operationof the controls and feelconfi-
dentwith eachof them.
ENGINE CONTROLS
Referto the engine manufacturer's Engine
Owner's Manual(included in the tiller liter-
ature package)to identify thecontrols on
your engine.
IMPORTANT:Thecontrol for stopping the
engine is locatedon the engine.
WHEEL DRIVE PINS
Eachwheel is equippedwith a wheeldrive
pin (A, Figures3-2 and 3-3) that secures
the wheelto the wheelshaft (B). The
wheels can be positioned in eithera
WHEELDRIVEor a FREEWHEELmode.
Never allow either of the wheels to be
in the FREEWHEELposition when the
engine is running. Always put both
wheels in the WHEEL DRIVE position
beforestartingthe engine.
Failure to comply could cause loss of
tiller control, propertydamage, or per-
sonalinjury.
Beforestarting the engine,put both
wheels in theWHEELDRIVEposition by
inserting the wheeldrive pinsthrough the
wheel hubs andthe wheel shaft. Doingso
"locks" the wheels to thewheel shaft,
causingthe wheels to turn wheneither the
ForwardClutchBail
ReverseClutch
Control(Models
634F/634B)
ulator
Height
Adjustment
WheelDrivePin
(oneachwheel)
Figure3-1: Tillerfeaturesandcontrols(5.5HPModelshown),SeeseparateEngineOwner's
Manualtoidentifyenginecontrols.
Forward Clutch Bail (all models) or the
ReverseClutch Control (Models 634Fand
634B) is engaged.
Usethe FREEWHEELmode only whenthe
engine is not running. In FREEWHEEL,the
wheeldrive pinsare placed onlythrough
the holes in the wheelshaft (not thewheel
hubs), thus allowing thewheels to turn
freely when you manually move the tiller.
To placethewheels in WHEELDRIVEor
FREEWHEEL:
1. Stop engine,disconnectspark plug wire
from spark plugand allow engineto cool.
Do not place tiller on its side when
changingwheel drive positions. Doing
so couldresult in gasoline leakingfrom
thefuel tank.
Failure to follow this instruction could
result in personal injury or property
damage.
2. Raiseonewheel about one inch off the
ground and placea sturdy support under
the transmission.
3. Removehairpin cotter (C, Figures3-2
and 3-3) from wheel drive pin (A).
4. FORWHEELDRIVEMODE(Figure3-2):
Slide wheel outward and align holesin
wheel hub (D, Figure3-2) andwheel shaft
(B). Insert wheeldrive pin (A) through
wheel hub (D) and wheelshaft (B). Secure
wheel drive pin with hairpin cotter (C) by
pushing hairpin cotter in as far as it will
go. Repeatwith the other wheeland then
removethe support from beneaththe
transmission.
I
D
Figure3-2: WHEELDRIVE position,
5. FORFREEWHEELMODE(Figure3-3):
Slidethe wheel inward and insert the
wheel drive pin (A, Figure3-3) only
through the hole in the wheelshaft (B).
Securewheel drive pin with hairpin cotter
(C) by pushing hairpin cotter in asfar asit
will go. Repeatfor the other wheeland
then removethe support from beneaththe
transmission.
I
D,
B,
Figure3-3: FREEWHEELposition.
Beforestartingengine, besurethat both
wheels are in WHEEL DRIVE position.
See WheelDrivePins for instructions.
Engaging the Forward Clutch Bail or
Reverse Clutch Control (if equipped)
when the wheels are not in WHEEL
DRIVE could allow the tines to rapidly
propelthetiller forwardor backward.
Failure to comply could cause loss of
tiller control, propertydamage, or per-
sonalinjury.
FORWARD CLUTCH BAIL
TheForward ClutchBail (E, Figure3-4)
controls the engagementof forward drive
to the wheelsand tines.
To operatetheForwardClutchBail:
1. Putwheels inWHEELDRIVEposition
(see"WARNING"statementabove).
2. Lift and hold the clutch bail (E, Figure
3-4) againstthe handlebarto start the
wheelsand tines rotating in a forward
direction.
3. Releasethe clutch bailto disengage
(stop) the wheelsand tines (the engine
will continue to run).
REVERSECLUTCHCONTROL
(Models634F/634Bonly)
TheReverseClutch Control (F, Figure3-4)
controls the engagementof reversedrive
to the wheelsand tines. Thereversing
featureis usedformaneuveringthetiller
only- neverengagethetines in the
groundwhile operatingin reverse.
Use extreme caution when reversing
or pulling the machine towards you.
Lookbehindtoavoidobstacles.
Neverattemptto till in reverse.
Failure to follow this warning could
result in personal injury or property
damage.
To operatethe ReverseClutchControl:
1. Putwheels in WHEELDRIVEposition
(see"WARNING"statementat the left).
2. Stopall tiller motion by releasingthe
ForwardClutch Bail.
3. Lift the handlebaruntil the tines clear
the ground, look behind you to avoid any
obstacles,and then pull the control knob
(F, Figure3-4) out. Thewheels and tines
will rotate in a reversedirection.
4. Releasethe control knob to disengage
(stop) the wheelsand tines (the engine
will continue to run).
F
E
Figure3-4: Allmodelshavea Forward
ClutchBail(E). OnlyModels634F/634B
havea ReverseClutchControl(F).
DEPTH REGULATOR LEVER
This lever(G,Figure3-5) controls the
tilling depthof thetines. Pull the lever
backand slide it up or down to engagethe
notched height settings.
The"travel position" (highest notch) raises
the tines approximately 1-1/2"off the
ground, allowing thetiller to be moved
without the tines contacting the ground.
This setting should also be usedwhen
starting the engine.
Moving the leverupwardwill increasethe
tilling depth. The lowest notch allows a
tilling depthof approximately 6",
depending on soil conditions. Forbest
results, alwaysbegin tilling at a very
shallow depth setting and gradually
increasethe tilling depth.
Do not attempt to till too deeply too
quickly. Gradually work down to
deepertilling depths.
Place the Depth Regulator Lever in
the '*travel" position before starting
the engine. This position prevents
the tines from touching the ground
until youare readytobegintilling.
Failure to follow this warning could
result in personal injury or property
damage.
TravelPosition
Settings
Figure3-5:DepthRegulatorLever(G).
HANDLEBAR HEIGHT ADJUSTMENT
Thehandlebar height is adjustableto three
different settings (Figure3-6). Ingeneral,
adjust the handlebarsso they are atwaist
levelwhen the tines are 3"-4"in the soil.
To adjustthe handlebars:
1. Stopengine, disconnect spark plug
wire from sparkplug and allow engineto
cool.
2. Removehardware,reposition handle-
bars,and reinstall hardwaresecurely.
Figure3-6:HandlebarheigMadjustment,
Operation
Before operating your machine, care-
fully read and understand all safety
(Section 1), controls (Section 3) and
operating instructions (Section 4) in
this Manual, in the separate Engine
Owner's Manual, and on the decals on
themachine.
Failure to follow these instructionscan
resultin seriouspersonalinjury.
INTRODUCTION
Readthis OperationSectionand the sepa-
rateEngine Owner'sManual beforeyou
start the engine. Then,take the time to
familiarize yourself with the basic opera-
tion of the tiller before using it in the
garden. Findan open,levelareaand prac-
tice using the tiller controls without the
tines engagingthe soil (put tines in
"travel" setting). 0nly after you've
becomecompletely familiar with the tiller
should you begin using it in the garden.
BREAK-INOPERATION
Perform the following maintenanceafter
the first two (2) hours of new operation
(seeMaintenanceSection in this manual
and in the EngineOwner's Manual).
1. Changeengine oil.
2. Checkfor loose or missing hardware
on unit. Tighten or replaceas needed.
3. Checktension on forward drive belt.
4. Checktransmission gear oil level.
STARTINGANDSTOPPING
THEENGINE
Pre-StartChecklist
With the spark plug wire disconnected
from the sparkplug, perform the following
checksand services beforeeach use:
1. Readthe Safetyand ControlsSections
in this manual. Readthe separateEngine
Owner's Manualprovidedwith the unit.
2. Put thewheels intheWHEELDRIVE
position (wheel pins must be through
holesin wheelhubs and wheelshaft).
3. Checkunitfor looseor missing hard-
ware. Serviceas required.
4. Checkengine oil level. SeeEngine
Owner's Manual.
ReverseClutchControl
(Models 634F/634B)
RecoilStarter
Depth
Regulator
WheelDrivePin
(on eachwheel)
Fig, 4-1
5. Checkthat all safety guardsand covers
are in place.
6. Checkair cleanerand engine cooling
system. SeeEngine Owner'sManual.
GASOLINEIS HIGHLYFLAMMABLEAND
ITS VAPORSAREEXPLOSIVE.
Follow gasoline safety rules in this
Manual (see Section1) and in the sepa-
rate EngineOwner'sManual.
Failuretofollow gasolinesafety instruc-
tions can result in serious personal
injuryandpropertydamage.
7. Fillthefuel tankwith gasoline
according to the directions in the separate
EngineOwner's Manual. Followall
instructions and safety rulescarefully.
8. Attach spark plug wire to spark plug.
StartingtheEngine
Thefollowing stepsdescribe howto start
and stop the engine. Donotattempt to
engagethe tines orwheels untilyou
haveread all ofthe operatinginstruc-
tionsin thisSection. Also, review the
safetyrulesin Section1: Safety,and the
tiller and enginecontrolsinformationin
Section3: Featuresand Controls.
1. Completethe Pro-Start Checklist on
this page.
2. Putthe wheels in the WHEELDRIVE
position (see WheelDrive Pinsin Section
3 of this manual).
To help preventserious personal injury
or damagetoequipment:
Before starting engine, put both
wheels in the WHEELDRIVEposition.
Never have wheels in FREEWHEEL
position when engine is running.
When the wheels are in FREEWHEEL,
they donot hold backthe tiller and the
tines could propel the tiller rapidly
forwardor backward.
Before starting engine, put Forward
Clutch Bail (all models) and Reverse
Clutch Control (Models 634F/634B
only)in neutral(disengaged)positions
byreleasinglevers.
Never run engine indoors or in
enclosed, poorly ventilated areas.
Engine exhaust contains carbon
monoxide,anodorlessanddeadlygas.
Avoid engine muffler and nearby
areas. Temperatures in these areas
may exceed150OF.
3. Move the Depth Regulator Leverall the
way down to the "travel" position, so that
the tines clearthe ground.
4. Releaseall controls on the tiller.
5. On engine's with a fuel shut-off valve,
turn valveto open position, as instructed
in the separateEngineOwner'sManual.
6. Put ignition switch and/or throttle con-
trol lever locatedon engine in the "ON",
"RUN", "FAST"or "START" position, as
instructed in the EngineOwner'sManual.
7. Chokeor primeengine,as instructed in
EngineOwner's Manual.
8. Putone handon fuel tank to stabilize
unitwhen pulling starter rope handle.
Thenuse recoilstarter to start engine,as
instructed in the EngineOwner'sManual.
Whenengine starts, gradually move choke
lever(if so equipped) to "NO CHOKE",
"CHOKEOFF"or "RUN" position.
9. Usethe "FAST"throttle speedsetting
when tilling.
Keepawayfrom rotatingtines. Rotating
tineswill causeinjury.
StoppingtheEngineand Tiller
1. To stop the wheels and tines, release
the Forward Clutch Bail(all models) or the
ReverseClutchControl (Models634Fand
634B) - whichever control is in use.
2. To stop the engine,putthe ignition
switch and/or the throttle control leverin
the "OFF"or "STOP" position.
OPERATINGTHETILLER
Thefollowing operating instructions pro-
vide guidelinesto using your tiller effec-
tively and safely. Besureto read Tilling
Tips& Techniques inthis Section before
actually putting the tines into the soil.
NOTE:This is atraditional "Standard-
Rotating-Tine"(SRT)tiller with forward
rotating tines. It operatescompletely dif-
ferently from "Counter-Rotating-Tine"
(CRT)tillers or from front-tine tillers.
1. Follow the Pre-Start Checklist atthe
beginning of this Section. Besure that the
wheels are in the WHEELDRIVEposition.
2. Move the Depth Regulator Leverall the
way down, so that the tines clearthe
ground. Usethis position when practicing
with the tiller and whentraveling between
tilling sites. Beforeactually tilling, move
the leverto thedesired depthsetting (see
Tilling Tips & Techniques).
3. Start engineand allow it to warm up.
Thenput throttle in "FAST"setting.
Fig.4-2: Useonehandtoguidetifterwhen
movingforward.
4. For forwardmotion of the wheelsand
tines:
(a) Pull ForwardClutch Bail (Fig. 4-1) up
against handlebar. Releasebail to stop
forward motion of wheels and tines.
(b) Whentilling, relaxand letthe wheels
pull the unit while thetines dig. Walk
behindand a little to one side ofthe
unit. Use one hand,yet keepa light--
but secure--grip on the handlebar
(while keepingyour arm loose). See
Fig.4-2. Letthe unit move at its own
paceand do not push down on the
handlebarsto try and force thetines to
dig deeper-- this takesweight off the
wheels, reducestraction, and causes
the tines to try and propel the tiller.
Do not pushdown on the handlebarsto
try to make the tiller till more deeply.
This preventsthe wheels from holding
the tiller backand can allow the tines
to rapidly propel the tiller forward,
which could result in loss of control,
propertydamage, or personalinjury.
5. Forreverse motion of thewheels and
tines (Models 634F/634B only):
(a) Look behind and exercisecaution when
operating in reverse. Donettill while
in reverse.
(b) Stopall forward motion. Lift handlebar
with onehand until tines are off the
ground and then pull ReverseClutch
Control knob out (seeFig. 4-3). To
stop reversing, let go of ReverseClutch
Control knob.
Fig. 4-3: Raise tinesoffgroundand look
behindwhen movingin reverse.
6. Tomove the Model 630B in reversefor
short distances:
(a) ReleaseForwardClutchBail. Thenlift
handlebaruntil tines are off the ground.
(b) Swing the handlebarto the left sothe
right wheeltakesa "step" backward.
Nextswing the handlebarto the right
so the left wheel"steps" backward.
Repeatas needed.
(c) If longer distances needto becovered
in reverse,shut off the engine,then
placethe two wheels in FREEWHEEL.
7. To Turn the Tiller Around:
(a) Practiceturning the tiller in a level,
openarea. Bevery careful to keep
your feet and legsawayfrom the tines.
(b) To begina turn, liftthe handlebarsuntil
thetines are out ofthe ground andthe
engineand tinesare balancedoverthe
wheels (Fig.4-4).
(c) With tiller balanced,pushsideways on
handlebarto steer in direction of turn
(Fig. 4-5). After turning, slowly lower
tines into soil to resumetilling.
Fig.4-4: Tobeginturn,lifthandlebarsuntil
tinesareoutofgroundandunitisbalanced.
Fig. 4-5: Withtinesout ofground,push
handlebarssidewaysto turntiller.
StoppingtheTiller and Engine
1. To stop thewheels and tines, release
the Forward ClutchBail (all models) or the
ReverseClutchControl (Models634Fand
634B) -whichever control is in use.
2. To stop theengine, put the ignition
switch and/orthe throttle control leverin
the "OFF"or "STOP" position.
TILLING TIPS & TECHNIQUES
Before tilling, contact your tele-
phone or utilities company and
inquire if undergroundequipment
or lines are used on yourproperty.
Do not till near buried electric
cables, telephone lines, pipes or
hoses.
Avoidpushingdownon the handlebarsin an attemptto force thetiller to dig deeper. Doing
so takesthe weight off the poweredwheels,causingthem to lose traction. Without the
wheels helping to hold the tiller back, the tines will attempt to propel the tiller - often
causingthetiller to skip rapidlyacrossthe ground. (Sometimes,slight downwardpressure
on the handlebarswill help get through a particularly tough section of sod or unbroken
ground,but in mostcasesthis won't benecessary.)
Avoidtrying to dig too deeplytoo quickly, especiallywhen busting sodor whentilling soil
that hasn't beentilled for sometime. Useshallowdepthregulatorsettings (onlyan inchor
two deep)forthefirst passesthroughthesoil. Witheachsucceedingpass,dig anotherinch
or two deeper. (Wateringtheareaa few days prior to tilling will maketilling easier,aswill
lettingthenewlyworkedsoilset for adayor two beforemakingafinal, deeptilling pass.)
Whencultivating (breakingup surfacesoil around plants to destroyweeds,seeFig.4-9), adjustthe tines to dig only 1"to 2"deep.
Usingshallowtilling depthshelpspreventinjuryto plantswhoserootsoften growcloseto thesurface. If needed,lift up on thehandle-
barsslightlyto preventthetinesfrom diggingtoo deeply. (Cultivatingona regularbasisnotonly eliminatesweeds,italso loosensand
aeratesthesoil for bettermoistureabsorptionand fasterplantgrowth.)
With experience,youwill find the "just right" tilling depthand tilling speedcombinationthat is best
for yourgarden.
Setthe enginethrottle leverat a speedto give theengineadequatepowerandyet allow it to operateat the slowest possiblespeed...at
least until you haveachievedthe maximumtilling depth you desire. Fasterenginespeedsmay be desirablewhen making final passes
through the seedbedor whencultivating. Selectionof the correct engine speed,in relationto the tilling depth, will ensurea sufficient
powerlevelto dothejob without causingtheengineto labor.
While tilling, relaxand letthe wheels pull
the tiller along while the tines do the dig-
ging. Walk on the sidethat is not yet fin-
ished (to avoid making footprints in the
freshly tilled soil) and lightly, butsecurely
gripthe handlebarwith just onehand.
Whenever possible, walk on the untilled
sideof the unit to avoidmakingfootprints
in your freshly tilled or cultivated soil.
Footprintscausesoil compactionthat can
hamperroot penetrationandcontributeto
soil erosion. They can also "plant"
unwanted weed seeds back into the
freshlytilledground.
Tilling wet soil often resultsin large, hard
clumps of soil that can interfere with
planting. If time permits,waita dayor two
after heavy rains to allow the soil to dry
beforetilling. Testsoilby squeezingit into
a ball. If it compressestoo easily,it is too
wetto till.
Whenpreparinga seedbed,go overthe samepathtwice in the first row, then
overlap one-half the tiller width on the rest of the passes (see Fig.
4-6). Whenfinishedin onedirection,makea secondpassat a right angle,as
shown in Fig.4-7. Overlapeachpassfor best results(in very hard ground,it
maytakethreeor four passesto thoroughlypulverizethesoil.)
If the garden size will not permit
lengthwise and then crosswise
tilling, then overlapthe first passes
by one-half a tiller width, followed I_
by successive passes at one-
quarterwidth (seeFig.4-8).
Fig, 4-8
Fig.4-6
With planning, you can
Fig.4-7
allow enough room _.r_, _,.P,_
between rows to cultivate II_11 II _ II
(seeFig.4-9). Leaveroom |_l_l <9I
for the hood width, plus 1< 1o1 1
enoughextra roomfor _ "._,_
future plantgrowth. Fig.4-9
TILLING TIPS & TECHNIQUES (cont.)
Powercompostingsimplymeanstilling underand buryinginthesoil all mannerof
organicmattersuchascrop residues,leaves,grassclippingsandcovercrops. This
materialwill decomposeduring thenon-growingseasonandadd importantnaturalnutri-
entsto thesoil.
Thefirst placeto beginiswith crop residuessuchas leftovervines,stalks,stemsand
roots. Powercompostthesecropresiduesas soonastheyfinish bearing.Thesooner
this isdone,the better,astendergreenmatteriseasierto till under. Usethedeepest
depthregulatorsettingpossiblewithoutcausingtheengineto laboror thetiller tojump
ahead.
Standingcornstalksof reasonableheightcanbepowercomposted. Pushingover (but
notuprooting)cornstalkswill oftenmakeiteasierto chopupthestalks. Keepthetines
clearofexcessivetanglingby"fishtailing"or frequentlyusingreverse.Makeseveral
passes,thenreturnafew dayslaterto finish off anyremainingstubble.
When power composting,do not keep
the Depth Regulator Lever at a deep
settingif thetiller jumpsor bucks.
If jumpingor buckingoccurs,movethe
Depth Regulator Lever down to a
shallow setting and then slowly
increase the tilling depth on later
passes.
Failure to follow this warning could
resultin personalinjury.
Aftertilling undercrop residues,add moreorganicmattersuchas leaves,grassclippingsandevenkitchenscraps. Whentilled intothe
soil, this organicmatterwill decomposeandaddevenmoreimportantnutrientsto thesoil.
After powercomposting,you maywant to planta "green manure"covercropto protectthesoil during theoff-season.Yousimply
grow acrop ofclover,alfalfa,buckwheat,peas,beans,ryegrass,grain,or kaleandthentill it intothe soil priorto the plantingseason.
Read thefollowingrecommendationsbeforetilling onslopes:
If you must garden on a moderate slope, please follow two very important
guidelines:
1.Till only on moderate slopes, neveron steepground where footing is difficult
(reviewsafetyrulesin Section1:Safetyof this manual).
2. Werecommendtilling up anddown slopesratherthan terracing. Tillingvertically
on a slopeallowsmaximumplantingareaandalsoleavesroomfor cultivating.
IMPORTANT:Whentilling on slopes,be surethe correctoil levelis maintainedin
the engine(checkevery one-half hour of operation). The incline of the slopewill
causethe oil to slant awayfrom its normalleveland this canstarveengine partsof
requiredlubrication. Keepthe motor oil levelatthefull pointat all times!
Tilling Upand DownSlopes(VerticalTilling)
To keepsoil erosionto a minimum, besure to add enoughorganicmatterto the
soil sothat it hasgood moisture-holdingtextureandtry to avoidleavingfootprints
or wheelmarks.
When tilling vertically, try to makethe first pass uphill as the tiller digs more
deeplygoing uphill than it doesdownhill. In soft soil or weeds,you may haveto
lift the handlebarsslightlywhile going uphill. Whengoing downhill, overlapthe
first passbyaboutone-halfthewidth ofthetiller.
Do not operate tiller on a slope too
steep for safe operation. Till slowly
and be sure you have good footing.
Never permit tiller to freewheel down
slopes. Failure to follow this warning
couldresultin personalinjury.
Tilling AcrossSlopesWithoutUsing
Terraces(HorizontalTilling)
If vertical or terracing gardening aren't
practicalfor you, then you can till laterally
acrossa slope. Wedon't recommendthis
methodasit cancreateunsurefooting and
invitessoilerosion.
As in terrace gardening,start at the top of
the slopeand overlapthe first pass by half
the width of the tiller. Foraddedstability of
thetiller, alwayskeepthe uphillwheelinthe
soft, newlytilledsoil.
TerraceGardening
Whena slopeis too steepor too short for verticaltilling, it maybe necessaryto till acrossthe slopeand createterracedrows. Ter-
racesare rowsthatare cut intothesideofa slope,creatinga narrow, butfiat areaon whichto plant.
Ona longslope,youcanmakeseveralterraces,one belowtheother.
Terracesshould beonly 2-to-3 feet wide. Diggingtoo far intothe sideof theslopewill exposepoor subsoilthat is unproductivefor
plants.
TILLING TIPS & TECHNIQUES (cont.)
TerraceGardening(continued)
To createa terrace,start at the top of the slopeand work down.Go backand forth 0_'_
acrossthe first rowas shownin Fig.4-10. _,_O
Each succeeding lower terrace is started by walking below the terrace you're O]_il "z)
preparing. Foraddedstability of the tiller, alwayskeepthe uphill wheel in the soft,
newlytilled soil. Do nottill the last 1T or moreof the downhilloutside edgeof each O]_[r_,EPEAT
terrace. This untilled strip helps prevents the terraces from breaking apart and
washingdownhill. Italso providesawalking pathbetweenrows. Fig.4-10
Thetines havea self-clearingaction which eliminatesmosttanglingof debrisin
the tines. However,occasionallydry grass,stringy stalks or tough vines may
becometangled. Followthese proceduresto help avoid tanglingand to clean
thetines, if necessary.
To reducetangling, set the depth regulator deep enough to get maximum
"chopping" actionasthe tines chopthe materialagainsttheground. Also,try
to till under crop residuesor cover crops while they are green, moist and
tender.
While powercomposting,try swayingthe handlebarsfrom sideto side (about
6"to 1T). This"fishtailing" actionoftenclearsthetinesof debris.
If tanglingoccurs, lift the tines out of the soil and run the tiller in reverse(if
unit is equippedwith poweredreverse)for a few feet. This reversingaction
shouldunwindagood dealof debris.
It may be necessaryto removethe debris by
hand (a pocketknife will help youto cut away
the material). Be sure to stop the engineand
disconnectthe spark plug wire beforeclearing
the tinesby hand.
Beforeclearingthe tines by hand, stopthe
engine, allow all movingpartsto stop and
disconnectthe sparkplugwire. Removethe
ignitionkeyonelectricstartmodels.
Failureto followthiswarningcouldresultin
personalinjury.
LOADINGANDUNLOADING
THETILLER
Loading and unloading the tiller into a
vehicle is potentially hazardousand we
don't recommenddoingso unlessabso-
lutely necessary,as this could result in
personalinjuryor propertydamage.
However, if you must loador unloadthe
tiller, followthe guidelinesgivennext.
Beforeloading or unloading, stop the
engine,wait for all parts to stop moving,
disconnect thespark plugwire and let
the engine and muffler cool.
Thetiller istoo heavyand bulky to lift
safelyby one person. Two or more
peopleshould sharethe load.
Usesturdy ramps and manually (engine
shut off) rollthe tiller into and out of the
vehicle. Two or more peopleare needed
to do this.
*The ramps must bestrong enough to
support the combined weight of thetiller
and any handlers.The ramps should pro-
vide good traction to preventslipping;
they should haveside rails to guide the
tiller along the ramps;and they should
havea locking deviceto secure them to
the vehicle.
Thehandlersshould wearsturdy footwear
that will helpto preventslipping.
Positionthe loading vehicle sothat the
rampangle is asflat as possible (the less
inclineto the ramp, the better). Turn the
vehicle's engineoff andapply its parking
brake.
Whengoing upramps, stand in the
normal operatingposition and pushthe
tiller ahead ofyou. Havea personat
eachsideto turn the wheels.
Whengoing down ramps,walk backward
with the tiller following you. Keepalert
for any obstacles behind you. Position a
person ateachwheelto control the
speedof thetiller. Nevergo down ramps
tiller-first, asthe tiller could tip forward.
Placewooden blockson the downhill
side ofthe wheels if you needto stop the
tiller from rolling down the ramp. Also,
usethe blocks to temporarily keepthe
tiller in placeonthe ramps (if neces-
sary), and to chock the wheels in place
after the tiller is in the vehicle.
After loading thetiller, prevent it from
rolling byengaging the wheels in the
WHEELDRIVEposition. Chockthe
wheels with blocks and securelytie the
tiller down.
Maintenance
Before inspecting, cleaning or
servicingthe machine, shot off engine,
wait for all moving parts to come to a
complete stop, disconnect spark plug
wire and move wire away from spark
plug. Remove ignition key on electric
startmodels.
Failure to follow these instructionscan
resultin seriouspersonalinjuryor prop-
ertydamage.
MAINTENANCESCHEDULE
PROCEDURE NOTES
Checkmotoroillevel 2,3
Cleanengine 2,7
Checkdrivebelttension 1,4
Checknutsandbolts 1,4
Changemotoroi_ 4,6,9
Lubricatetiller 4
Serviceengineaircleanersystem 7
Checkgearoil levelintransmission 1,5
Checktinesforwear 5
Checkairpressurein tires(ifunit
haspneumatictires) 5
Servicesparkptog 7
NOTES
1 - Checkafterfirst 2hoursofbreak-inoperation,
2 -Beforeeachuse.
3 - Every5operatinghours,
4 - Every10operatinghours,
5 - Every30operatinghours,
6 - Changemorefrequentlyin dustyor dirty
conditions,
7 - SeeEngineOwner'sManua!forservice
recommendations.
8 - Whichevertimeintervaloccursfirst,
9 - Changeafterfirst2hoursofbreak-in
operation,
TILLERLUBRICATION
After every 10 operating hours, oil or
greasethe lubrication points shown in
Figure5-1 and described below.
Usecleanlubricating oil (#30 weight
motor oil is suitable) and cleangeneral
purposegrease(greasecontaining a metal
lubricant is preferred, if available).
Removethewheels, cleanthe wheel
shaft (A, Fig. 5-1) and applya thin
coating of greaseto the wheel shaft.
Greasethe back,front and sides of the
depth regulator lever (B,Fig. 5-1).
Removethetines and cleanthe tine shaft
(C, Fig. 5-1). Usea file or sandpaperto
gently removeany rust, burrs or rough
spots (especiallyaround holesin shaft).
Apply greaseto endsof shaft before
installing tines.
Oilthethreads on the handlebarheight
adjustment screws andthe handlebar
attaching screws (D, Fig.5-1).
D
A
Figure5-1
CHECKFOROILLEAKS
Beforeeach use,checkthetiller for signs
ofan oil leak- usuallya dirty, oily accu-
mulation either on the unit or on the floor.
A little seepagearounda cover or an oil
sealis usually not a causefor alarm. How-
ever, if the oil drips overnight,then imme-
diateattention is needed. Ignoring an oil
leakcanresult in severe transmission
damage!
If a cover is leaking,checkfor loose
screws. If the screws are tight, a new
gasket or oil seal maybe required.
If the leakisfrom around a shaft and oil
seal,the oil seal probably needsto be
replaced. Seeyour authorized dealer or
contact thefactory for serviceor advice.
IMPORTANT:Neveroperatethetiller ifthe
transmission is low on oil. Checkthe oil
levelafter every30 hours of operationand
whenever there isany oil leakage.
CHECKHARDWARE
Checkfor looseor missing hardwareafter
every 10 operating hoursand tighten or
replace(as needed)beforereusingtiller
Besureto checkthe screws underneath
the tiller hood that securethetransmission
cover and the Depth RegulatorLeverto the
transmission.
CHECKTIRE PRESSURE
(Modelswith pneumatictires)
Checktheair pressurein both tires. The
air pressure should be between 15-20 PSI
(pounds per square inch).
Keepbothtires equally inflated to help
prevent machinefrom pullingto one side.
TRANSMISSIONGEAR
OILSERVICE
Checkthetransmission gear oil levelafter
every 30 hours of operation or whenever
you noticeany oil leak. Operatingthetiller
when thetransmission is low on oil can
result in severedamage.
A. To ChecktheTransmission
GearOil Level:
1. Checkthe gear oil levelwhen thetrans-
mission is cool. Gearoil will expandin
warm operatingtemperatures and this
expansion will providean incorrect oil
levelreading.
2. With the tiller on levelground, pull the
Depth RegulatorLeverall theway up.
3. Removethe oil fill plug (A, Fig.5-2)
from thetransmission housing and look
insidethe oil fill holeto locatethe main
drive shaft situated below the hole.
I
_ efore inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to
cometo a complete stop, disconnectspark plug wire and move wire awayfrom spark plug.
Failure to follow these instructionscan result in serious personal injury or propertydamage.
4. Thegear oil levelis correct if the gear B. To Drainthe TransmissionGearOil: BOLOTINES
oil isapproximately halfwayup the side of
the maindrive shaft.
5. If the gear oil level is low, add gearoil
as described next. If the gear oil level is
okay,securelyreplacethe oil fill plug.
IMPORTANT:Do not operatethe tiller if
the gear oil levelis low. Doing sowill
result in severedamageto thetransmis-
sion components.
Thetransmission gear oil does not needto
bechangedunless it hasbeencontami-
natedwith dirt, sandor metal particles.
1. Drain gasolinefrom the fuel tankor run
the engine until the fueltank is empty. See
"DANGER"statementbelow.
Gasoline is highly flammable and its
vapors are explosive. Follow these
safety practices to prevent personal
injury or property damage from fire or
explosion.
Allow the engine and muffler to cool
for at least two minutes before
drainingthetiiler's gasolinetank.
Do not allow open flames, sparks,
matchesor smokingin the area.
Wipe away spills and pushtiller away
from spilledfuel.
Use only an approved fuel container
and store it safely out of the reach of
children.
Figure5-2: Removeoilfillplug(A)tocheck
gearoillevelandtoaddgearoiL Remove
fourcoverscrews(B)todraingearoil.
6. If adding only a few ounces of gear oil,
useAPI ratedGL-4 or GL-5 gearoil having
a viscosity of SAE140,SAE85W-140 or
SAE80W-90. If refilling an empty trans-
mission, useonly GL-4 gear oil havinga
viscosity of SAE85W-140 orSAE140.
IMPORTANT:Donot useautomatic trans-
mission fluid or motor oil in the transmis-
sion.
7. While checkingfrequentlyto avoid
overfilling, slowly add gear oil into the oil
Do not storegasolinein an area where
its vaporscould reach an open flame
or spark, orwhere ignitionsourcesare
present (suchas hotwater and space
heaters, furnaces, clothes dryers,
stoves,electricmotors,etc.)
2. Drainthe oil from the engine.
3. Removefour screws (B,Figure5-2) and
removetransmission coverand gasket.
4. Removethe left-sidewheel.
5. Tilt the left-sidewheel shaft into a drain
panand allow the gear oil to drain through
the top of the transmission.
6. Reinstallthe wheel.
fill hole until it reachesthe halfwaypoint
on the drive shaft. 7. Installa newgasket(do not reuseold
gasket)and reinstall thetransmission
8. Securelyreplacethe oil fill plug. cover.
8. Refillthe transmission using GL-4gear
oil (SAE85W-140 or SAE140).
9. Refill the enginewith motor oil and
replenishthe fuel tank with gasoline.
Thebolo tines will wear with useand
should be inspectedatthe beginning of
eachtilling seasonand after every 30
operating hours. Thetines can be
replacedeither individually or asa com-
pleteset. Seethe PartsList pagesfor tine
identification and part numbers.
A. Tine Inspection:
With use,the tines will becomeshorter,
narrower and pointed. Badlyworn tines
will result in a loss of tilling depth, and
reducedeffectivenesswhen chopping up
andturning under organic matter.
B. Removing/Installinga Single Tine:
1. With theengine shut oft and the spark
plug wire disconnected,remove thetwo
screws (A, Figure5-3), Iockwahers(E)and
nuts (B) that attach a singletine to a tine
holder. If needed,usepenetrating oil on
the nuts.
2. When installing a single tine, be sureto
position it so that its cutting edge (sharp)
will enterthe soil first as the tiller moves
forward.
C. Removing/Installinga TineAssembly:
1. A tine assembly consists of eight tines
mounted on atine holder.
2. If removing both tine assemblies,mark
them "left" and "right" beforeremoval.
Removethe screw (C, Figure5-3), lock
washer (E) and Iocknut (D) that securethe
tineassembly to the tine shaft. If neces-
sary, usea rubber mallet to tapthe tine
assemblyoutward off the shaft.
3. Beforereinstalling the tine assembly,
inspectthe tine shaft for rust, rough spots
or burrs. Lightly file or sand, as needed.
Applya thin coat of greaseto the shaft.
4. Installeachtine assembly so that the
cutting (sharp) edge of the tines will enter
the soil first whenthe tiller moves
forward. Securethe tine assemblyto the
tine shaft using the screwand Iocknut
previously removed.
I
_Betore inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to
I l Icometeacomplete stop, disconnectsparkplug wire and movewire awayfrom spark plug.
I !lmK_ IFailure tofollow those instructionscan result in serious personal injury or propertydamage,
I
H'
I
_NE
SHAFT
ENGINE
A
D
E
B
Figure5-3: Installtinessothatcuttingedgeoftinesentersoilfirstwhentillermovesforward.
CHECKINGANDADJUSTING
FORWARDDRIVEBELTTENSION
It is important to maintain correcttension
on theforward drive belt. A loosebelt will
causethetines and wheels to slow down-
or stop completely - eventhough the
engine is running at full speed. A too tight
belt can result in unintentional tine move-
ment when the clutch bail is in the Neutral
(released)position.
Checkbelt tension after the first two
hours of break-inoperationand after
every 10 operating hours
Atthe end of eachtilling season,check
the beltfor cracks,cuts or frayed edges
and replaceit assoon as possible
measurementis between 1/16"-to- 3/16'
longer thanthe first measurement
4. If thespring istoo short (less than
1/16"),the tension istoo loose. If the
spring istoo long (more than 3/16"), the
tension is too tight.
5. Toadjust the lengthof the spring:
a. Releasethe Forward ClutchBail.
b. Unthreadthe hex nut (C, Figure5-4)
about halfwayup the adjustment
screw (D).
c. Unhookthe top of the spring from
the ForwardClutch Bail.
d. Usepliers to preventthe adjuster (B)
from turning and turn the slotted
screw located inside thespring
clockwise (viewedfrom operator's
position) to increasetension on the
spring. Turnthe screw counter-
clockwise to decreasetension. Once
adjusted, reattachthespring to the
ForwardClutch Bail.
e. RepeatSteps2 and3 to re-measure
the lengthof the spring. Whenthe
secondmeasurementis between
1/16"-to- 3/16" longerthanthefirst
measurement,retightenthe hexnut
(C)againstthetop of theadjuster (B).
ReplacementBeltInformation
If the drive belt needsto be replaced,see
your localauthorized dealeror referto the
Parts List for ordering information. Use
onlya factory-authorized beltas an "over-
the-counter" belt may not performsatis-
factorily. The procedurerequiresaverage
mechanicalability and commonly available
tools.
ToCheckForwardBeltTension:
1. Stop engine,wait for all partsto stop
moving and disconnect spark plugwire.
2. With the Forward ClutchBail in an
open (released)position, measureand
notethe overall length of the cablespring
(A, Figure5-4) by measuringfrom the out-
ermost coil to the outermost coil.
3. Squeezethe Forward Clutch Bail
againstthe handlebar(seeFigure5-4) and
re-measurethe length of the coils The
belttension is correct if this second
Figure5-4: Tocheckforwardbelttension,taketwomeasurementsof
theoveralllengthofthecoilsinthespring- firstwiththeclutchbail
open,thenwiththeclutchbailclosedagainstthehandlebar.
I
_ eforeinspecting,cleaningor servicingthe machine,shutoffengine,wait for all movingpartsto
cometoa completestop,disconnectsparkplugwireandmovewireawayfromsparkplug.
Failuretofollowtheseinstructionscanresultin seriouspersonalinjuryorpropertydamage.
FORWARDCLUTCH
BAILADJUSTMENT
If the ForwardClutch Bail doesnot func-
tion properly, first checkthat the forward
drive belt isadjusted properly (see
Checkingand Adjusting Forward Drive
Belt Tension). If this fails to correct the
problem, contact the factory Technical
ServiceDepartment or your authorized
dealerfor serviceadvice.
CHECKINGANDADJUSTING
REVERSEDRIVE BELTTENSION
(Models 634F/634B only)
It is important to maintain correct tension
on the reversedrive belt. A loosebeltwill
causethetines and wheelsto slow down-
or stop completely - eventhough the
engine is running at full speed.
When checking belttension, also check
the belt for cracks,cuts or frayed edges
and replaceitas soon as possible.
Checkbelttension afterthe first two
hours of break-in operationand after
every 10 operating hours.
To CheckReverseBeltTension:
1. Stop engine,wait for all partsto stop
moving and disconnect spark plug wire.
2. Removescrew in plastic beltcover and
slide beltcover (which isattachedto for-
ward clutch cable)out ofthe way.
3. Havean assistant pull the Reverse
ClutchControl knoball theway out and
hold it in that position. Measurethe
length ofthe cablewire betweenthe end
of thethreaded cableadjuster (A, Figure5-
5) and the end of the z-fitting (B)to which
the cablewire is attached.
4. Thebelttension is ideal if the cablewire
lengthmeasuresbetween1/8"to 1/4". If it
is lessthan 1/8" (andifthere is no reverse
action when thetiller is running), then
makethefollowing adjustments.
NOTE:If the length is morethan 1/4", no
adjustment is needed--as long asthe
reverseaction functions properly.
5. Releasethe ReverseClutchControl
knob.andthen unthreadthe inner jam nut
(C,Figure5-6) oneto two turns. Pullthe
threadedcableadjuster (A, Figure5-6) to
the left until the innerjam nut (C)touches
the bracket.
6. Preventthe inner jam nut (C)from
turning and tighten the outerjam nut (D)
against the bracket. Preventthe outerjam
nut (D) from turning and tighten the inner
jam nut (C)against the bracket.
7. Measurethe gap by repeatingStep3.
Readjustas neededby repeatingSteps5
and 6.
8. Reinstallthe belt cover.
Figure5-5." Measurecable wire lengthto
checkfor correctreversebelt tension.
Figure5-6: Movethreaded
adjuster(A) toleft toincrease
belt tension.
ReplacementBeltInformation
If the drive belt needsto be replaced,see
your localauthorized dealeror refer to the
Parts List for ordering information. Use
only a factory-authorized beltasan "over-
the-counter" belt maynot perform satis-
factorily. Theprocedure requiresaverage
mechanicalability and commonly available
tools.
ENGINECLEANING
Keepingthe engine cleanwill help to
ensuresmooth operationand prevent
damagefrom overheating. Refertothe
EngineOwner's Manualfor engine
cleaningservice intervalsand instructions.
Besure that the muffler is cool beforeser-
vicing theengine.
AIRCLEANERSERVICE
Theair cleanerfilters dirt and dust out of
the air beforeit enters the carburetor.
Operatingthe enginewith a dirty, clogged
air filter cancause poor performanceand
damageto theengine. Neveroperatethe
engine without the air cleanerinstalled.
Inspectand servicethe air cleanermore
often if operating in very dusty or dirty
conditions. Referto the EngineOwner's
Manualfor air cleanerservice intervals
and instructions.
ENGINEOILSERVICE
Checkthe engine oil levelbeforeeach use
and after every 5 hours of continuous
operation. Runningthe enginewhen it is
low on oil will quickly ruin the engine.
It is recommendedthat you changethe
motor oil after every 10 hours of operation
and evensoonerwhen operating in
extremely dirty or dusty conditions. Refer
to the Engine Owner'sManualfor detailed
service instructions.
A. To ChecktheEngineOil Level:
1. Parkthetiller on a levelareaand shut
off the engine.
2. Levelthe engine (usethe Depth Regu-
lator Leverto adjust the engineangle).
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Troy-Bilt 21A-630B063 Owner's manual

Category
Mini tillers
Type
Owner's manual
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